"Marvin!" Izuku exclaimed.
Marvin grinned, baring his fangs but not looking at Izuku. "Hey, Midoriya. Sorry, I took so long; I remembered some things and had to get back up."
1-A burst onto the rooftop, most riding Shoto's ice except for Kirishima, who was riding on Bakugo's shoulders as the boy exploded forward.
Wolfram snarled. "All of you are WEAK!"
He slammed his hands down, sending dozens of metal columns at them.
Marvin ripped through them like wet paper, reaching the villain in the blink of an eye.
He punched Wolfram in the jaw, his other fist landing on the villain's liver a second later.
Marvin twisted, kicking Wolfram in the side before Wolfram threw him back with a metal column.
Marvin slid back to Izuku and All Might, his arms in an X shape to block the metal.
He shattered the metal with ease, his teeth bared in a crazed grin.
"Hey, Creati?" Marvin called. "Can you make me a knife?"
Momo blinked but nodded, tossing a combat knife at him as Wolfram attacked again.
Izuku and All Might leaped forward, Marvin watching their backs, destroying the creations that got past them.
"You'd think you'd be a bit more vigilant!" Marvin yelled, kicking a metal column to shreds.
"We're trying!" Izuku replied, getting launched back.
Marvin caught him, tossing him to Momo before rushing to Wolfram.
"THEN TRY HARDER!" He yelled, smashing through a wall and rushing the villain.
He ducked under Wolfram's columns, shattering them with an upward kick.
He launched forward, snapping his fingers and using Null Void.
Marvin punched Wolfram with all his strength, drawing blood from the villain's nose.
His knife lashed out, cutting away one of Wolfram's hands before slashing the villain's stomach.
He ducked again, only to get hit in the chest by another column and launched back.
Marvin backflipped to cancel his momentum, leaping over another column before smashing it with a kick.
Marvin skidded back, his breath a bit shallow.
"Are you ok?" Melissa asked, and Marvin nodded.
"Yeah, just quick thing, don't look at me for a second," He told her, reaching behind him.
He grabbed the cloth bound tightly around the base of his neck, which covered his weak spot.
Marvin took a deep breath before ripping it away harshly.
Everyone in the area tensed as Marvin's breath quickened, his hand moving to his blindfold.
"This is going to hurt," Marvin whispered, untying it and letting it fall.
His Dominance Factor roared, causing almost everyone in the area to freeze in fear.
"Thankfully, not for me," He finished, his gaze shooting over to Wolfram.
Marvin took a deep breath and made a diamond with his hands, putting Wolfram in the center.
'Eyes of Heaven.'
Wolfram threw himself back, eyes wide as Marvin's Dominance Factor focused on him.
Marvin bared his fangs in an open-mouth snarl, further increasing the effect his Factor had.
All Might slammed into Wolfram, punching the villain twice before he could react.
Wolfram stumbled, launching metal wildly as he tried to overcome the mind-numbing fear.
Marvin felt his eyes burn as he stared; he couldn't blink, or the effect would deactivate.
All Might punched Wolfram in the stomach, slamming him against his metal constructs.
Wolfram punched back wildly, his mind still reeling with terror.
Marvin squinted, trying to make the effect last as long as possible, feeling like his eyes were on fire.
Izuku kicked Wolfram in the stomach, pulling the villain off balance with Blackwhip and kneeing him in the jaw.
Wolfram stepped back, barely blocking All Might's onslaught as his body trembled.
Marvin broke his gaze, turning away sharply and crouching as he held his closed eyes.
Tears leaked out of his eyes, and he rubbed them away harshly before trying to stand.
Wolfram punched Izuku in the gut, sending him flying back before dodging All Might's fist.
The villain grabbed the Pro by the throat, choking him with surprising strength.
Metal roared towards 1-A, forcing them to dodge or destroy them.
"GODDAMMIT," Bakugo yelled as he destroyed a column. "ARE YOU GOING TO FIGHT OR NOT, YOU ERASERHEAD WANNABE?"
That snapped Marvin out of his pain, and he stood, taking a deep breath and gathering his strength.
Marvin leaped forward, reaching Wolfram with a roar.
His fist slammed into the villain's face before he twisted, grabbing Wolfram by the face and slamming him against the floor.
Wolfram punched him back, but Marvin's movement freed All Might from the villain's grip.
Wolfram launched both back with tons of metal, trapping the two and trying to crush them.
Izuku appeared, smashing the metal prison with a kick before grabbing them with Blackwhip.
Wolfram scowled, gathering all the metal he could control into a giant cube before sending it to crush them.
Izuku flipped, launching Marvin and All Might into the air toward the cube.
"All Might, I got the cube covered," Marvin yelled in English. "Focus on the villain."
All Might gave him a look of concern, but Marvin's determined expression made him nod.
The Pro launched himself back, leaving Marvin soaring towards the cube.
Marvin drew back his fist, pulling on every ounce of strength he had; he hadn't wanted to use this, but some sacrifices were necessary.
'Arrogant Hope: One-second Minutes.'
Time slowed to a crawl, and his strength exploded, and he gritted his teeth in pain. Arrogant Hope was the name of his time-slowing ability, given by Rinai after a particularly damaging fight.
'King's Death: 20%.'
He was just inches from the cube, and his power roared, with every inch of muscle feeling like it was dipped in acid.
His fist launched out, hitting the cube with enough force to level a city.
The cube exploded with a deafening boom, shattering into thousands of pieces as Marvin hit it.
Powerful winds ripped through the area, and only Shoto's quick ice usage stopped 1-A from being thrown off the roof.
All Might launched at Wolfram as the cube exploded, while Izuku sent Blackwhip at Marvin to catch him.
Marvin twisted, grabbing Blackwhip before launching Izuku into the air after All Might.
Izuku flew through the air next to grinning All Might, who pulled back his fist.
"Ready, Young Midoriya?" He asked.
Izuku nodded, drawing back his fist with a smile.
Marvin fell, twisting through the air until Todoroki caught him with his ice.
He tumbled down before immediately jumping up, holding his broken left arm.
"Oh my god, your arm is broken," Melissa exclaimed, but Marvin waved her off.
"Been through worse," He told her, flicking his wrist sharply and nodding a little; it hurt, but he could handle it.
Izuku and All Might soared towards Wolfram, their fists drawn back as Wolfram shielded himself with a metal cocoon.
'One for All.'
Power surged through them, lighting up the air around them.
'Double Detroit Smash!'
Their fists landed, smashing through Wolfram's defenses like they were made of eggshells.
Wolfram's scream was lost to the wind as he failed to block the attack.
The metal hellscape exploded around them, the double smash vaporizing it instantly.
The Full Gauntlet strained but managed to stay together, making Izuku grin.
He and All Might landed heavily as David slowly regained consciousness.
Izuku yelled in triumph, raising his fist with a half-crazed laugh. The top of his Hero costume was utterly shredded, and his shoulders had minor cuts, but he didn't care.
"I already told you I'm the crazy one," Marvin grinned, jogging over with Melissa.
"Oh, god, your arm," Izuku exclaimed, but Marvin waved it off.
"Nah, it's fine. I've had worse," He told Izuku, rolling his shoulders. "Though, I am getting rusty."
"That was rusty?" Melissa asked, staring at him in shock.
Marvin sighed. "I was at around half my power, and it's been years since I've had a fight where I needed to use any special attacks."
He ran a hand through his curls, not unlike Izuku's. "I probably could've helped more if I was at full power. Sorry about that."
Izuku rolled his eyes, punching Marvin in his uninjured arm. "It's alright. We still couldn't have done it without you."
Melissa smiled before turning suddenly. "DAD!"
She ran over to David, falling to her knees and hugging him tightly.
"I'm so glad you're ok," She said into his shoulder, gripping him tightly.
David hissed a little. "Melissa, I'm still injured," He said apologetically.
Marvin approached them, his blindfold back on and one of the bandages from his arm wrapped around his neck.
"Hold on, I can help," He said, crouching next to David with a roll of bandages, courtesy of Momo.
"Uhh, don't you need to see?" David asked.
Marvin turned to him, eyes still covered. "I can see with more than my eyes, Mr. Shield."
He leaned forward, using his knife to remove the bullet quickly before applying bandages with practiced ease.
"You've done this before?" Melissa asked as Marvin wrapped the bandages tightly.
Marvin nodded. "I've been shot a lot. So has my sister. I learned some things," He replied, pulling the bandages and drawing a hiss from David.
He cut the bandages with his knife, tying them tightly and leaning back.
"That should do until he can get to a hospital," Marvin said in English. "It doesn't seem the bullet hit anything too bad. His stomach is slightly damaged and will be acting funny for a few days, but besides that, you'll be fine."
Melissa sighed in relief. "Thank you," She told him before her brows furrowed. "But how did you get here from those pills?"
Marvin took a deep breath. "There was a Quirk mishap that led to me having a slight mental connection with Midoriya. We can talk to each other and even appear for a few seconds, but those pills enhanced the reaction, bringing me completely over."
"Oh, ok," Melissa nodded slowly. She didn't know what kind of Quirk could do the things described, but there were so many amazing ones she didn't have a reason to doubt him. It's not like Marvin had told a complete lie, either.
Momo rushed to Izuku, hugging him tightly and nearly making him fall over.
"I'm so happy you're ok," She told him, swaying back and forth in their hug.
Izuku smiled. "And I'm happy you're safe. We won. We saved everybody."
Momo smiled and pulled back. "We did, didn't we?"
"Another win for Duality and Creati?" Izuku said with a grin.
"I think I would come first," Momo replied. "Alphabetical order, remember?"
Izuku laughed a little, and Momo bit her lip. She knew Marvin was still out, and it's not like she'd get another chance like this.
'Now or never, Momo,' She told herself. 'Plus Ultra, right?'
Izuku paused as Momo's hands grabbed the back of his head, her fingers playing with his curls as she made him look at her.
Momo leaned forward before she could stop herself, kissing him fiercely.
Izuku stumbled back, his eyes closing automatically as he registered what was happening.
His hands went around her waist subconsciously, pulling her in tighter as he returned the kiss.
Wolf whistles sounded as 1-A noticed, but neither particularly cared at the moment.
"I love you so much," Momo murmured against his lips.
"I love you too," Izuku replied, kissing her again.
Momo trailed her hands through his hair, internally screaming in happiness as they continued to kiss.
Marvin rolled his eyes from under his blindfold as he watched the scene, a small smile on his face.
"Talk about finally," He muttered. "They've tried twice already."
"Are they dating?" Melissa whispered to him as Class 1-A continued to cheer, particularly Mina and Uraraka.
Marvin snorted. "If they aren't now, I'm going to punch him," He replied.
Izuku and Momo broke apart slowly, staring at each other, their breathing shallow as they smiled.
"I enjoyed that," Momo whispered, her arms around his neck.
Izuku gulped, his face red as he stared at the slight smile on Momo's face. Had she always been that stunning? She had always been beautiful, sure, but now he looked at her like one would stare at a goddess, and he didn't have a single problem with Momo being his.
"I- um. I'm glad you like it," Izuku smiled, rubbing the back of his head.
"All this time," Momo told him, trailing his jaw. "And you're still nervous?"
"I mean- well. It's you; of course, I'm nervous," Izuku replied, completely sincere.
Momo's eyes widened, her face going bright red as she failed to come up with a response.
Instead, she decided to bury her head in Izuku's neck, her face hot as she hugged Izuku tightly.
All Might leaned down next to Marvin, steam coming off his body.
"Young Mikrai, I need to go," All Might whispered. "Tell Young Midoriya I'm grateful for his help."
Marvin nodded. "Sure. I'll cover for you, don't worry."
All Might left quickly, being surprisingly stealthy for someone so massive.
Marvin cracked his neck and stood. He didn't know how much time he had left, but he was sure more than fifteen minutes had passed, yet he was still here.
"Hey, Marvin?" Melissa asked.
Marvin turned to her, and Melissa knew he was looking at her even with his eyes covered.
"How can you see with that?" She asked, gesturing to his blindfold.
"Training," Marvin replied. "I can sense the vibrations in the air like how bats use echolocation. It gives me near-perfect knowledge of my surroundings, especially enclosed areas."
"But why cover your eyes?" She asked. "Wouldn't it better to have them open in case your senses can't pick something up?"
Marvin sighed and uncovered an eye but kept it closed. "Promise you won't scream?"
Melissa did a double take. "Uhh, sure? But why would I scream?"
Marvin opened his left eye, staring at Melissa and waiting for the effect to kick in.
Several seconds passed, with Marvin not removing his gaze, but Melissa just swayed a little.
She stared at him oddly. "Is something supposed to happen?"
He blinked, his brows furrowing in confusion. "What the hell?"
He glanced at David, who immediately began backing away slowly, fear on his face.
Marvin frowned and looked at Melissa, but she was unfazed, looking at him strangely.
"My eyes do this thing where anyone I look at feels intense fear," He said slowly. "I can't turn it off, either. But you seem immune for some reason."
"Could it be that I don't have a Quirk?" She asked. "Maybe it affects the Quirk Factor, and that's why I'm unbothered?"
Marvin thought for a second. Before Melissa, the only person immune was Rinai, who was also immune to his Dominance Factor as a whole.
But Rinai was experimented on, and it could be said she had a Quirk, not a flashy one, but David didn't have a flashy Quirk, and it still worked on him.
'People can be immune?' He thought. 'But if it were that easy, why didn't any Hunters use it? They hated my Factor, so if they could disable it, why didn't they? Is it only certain people that are immune?'
"I'm... not sure," Marvin said slowly, uncovering his other eye. "Are you still unaffected?"
Melissa blinked, gulping a little as he stared at her. She was feeling something, but it definitely wasn't fear.
She took a calming breath. "I still don't feel any fear. I'm not scared of you."
Marvin froze, his body jerking as he blinked. When was the last time he'd heard that? Rinai was the only one not scared of him; everyone else always avoided him.
"Your heart rate went up," He told her after a second. "Are you sure?"
Melissa blinked. "You can hear heartbeats?"
Marvin nodded. "Yeah, why?"
"What kind of Quirk do you have?" She asked in shock.
Marvin flushed, looking down and rubbing the base of his neck. "I- uhh."
He turned as Todoroki approached them, sighing in relief.
"You helped us," Todoroki said. "Thank you."
Marvin smiled at him before quickly covering his eyes as Todoroki stepped back in fear.
"Sorry about that," Marvin told him, tightening his blindfold. "And it's no problem. I'm just annoyed Midoriya didn't call me earlier."
Todoroki glanced at Izuku, who was still holding Momo.
"Hold on," Marvin mumbled, picking up a piece of rubble with his right arm.
He stood and aimed before lobbing it at Izuku fast enough to make it whistle through the air.
Izuku turned, his rudimentary senses flaring as he felt the object come closer.
Blackwhip launched out, grabbing the rubble just before it hit him in the head.
"Really?" He asked, holding it up.
Izuku grabbed it and aimed, throwing it at Marvin with all his force.
Marvin grinned and jumped, twisting mid-air and catching it as it passed under him.
He landed with a spin, twirling and shooting it back at Izuku faster than before.
Izuku flinched, barely dodging the rubble as it whistled past his head faster than his eyes could track.
"You're slow," Marvin called, sauntering over to him.
Izuku sighed in response. It appeared Marvin's teasing continued even in the outside world.
"I will tell Melissa you like her," Izuku whispered, knowing Marvin could hear him.
Marvin's eyes narrowed. "I have more ammo on you and Momo than you do on me. Besides, my ability to lie is better than your knowledge of the truth."
Izuku blinked, mouth slightly open as he failed to come up with a response.
He closed his mouth with a snap, causing Marvin to smirk in amusement.
"We need to go," Marvin said, showing the back of his hand and tapping his wrist twice.
Izuku's brows knit together. "How much time do you have left?" He whispered.
Marvin shrugged. "Not a clue. It's been like an hour, and this shows no signs of stopping, but if I randomly start fading, then it'll be hell to explain."
He sighed. "Most of the class is wary, too. They don't know me; I can sense their desire to attack me even from here. If I make one wrong move, well, it isn't going to be fun to deal with."
Marvin rolled his neck, and Izuku and Momo cringed a little as a crack sounded.
"Plus, even though I can sense everything around me with zero difficulty, covering my eyes is still annoying. So, being able to see through your eyes, even if you're blind as shit, would be preferred."
Izuku rolled his eyes. "Is everything about my body sub-par?"
Marvin shook his head. "Not everything. You have decent pain tolerance and reflexes, but everything else sucks. That's not me being mean; you just have to realize that my sight is so good I can see into the ultraviolet and infrared spectrums, and my hearing can pick up the sound from a contact ultrasonic transducer."
Izuku blinked. "What's that?"
"An object used often in the medical field to find things like certain cancers," Momo replied. "It's also often used for ultrasounds."
"Is... that good?" Izuku asked, unsure of what either of them meant.
Marvin sighed. "Basically, my hearing's around 800 times better than the average person, at least at full power."
"Oh," Izuku said intelligently.
Marvin rolled his eyes and turned to Momo. "You really love this idiot?" He asked, playing jabbing his thumb at Izuku.
"HEY!" Izuku exclaimed.
Momo smiled and kissed his temple, her arm around his shoulder. "He's slow sometimes, but he's mine; that's all that matters."
"Is it gang up on Izuku day?" Izuku grumbled.
Marvin raised an eyebrow, and Izuku's face turned bright red.
"Shut up," He muttered.
"I didn't say anything," Marvin replied, deadpanned.
"You were going to," Izuku grumbled, and Marvin snorted.
.
.
.
Author's Note: And that's the Movie! There's an epilogue scene of Melissa talking to David, but I probably won't write that since it doesn't add much to the main-character interactions.
Marvin isn't fully formed; he's just staying outside for a while longer than the fifteen minutes, which will be explained later. It's somewhat mentioned in the last chapter, but you'd need to dig for it to understand, but it'll become clearer afterward.
Also, as you can tell, Marvin is STRONG. The combined total of his strength, with Arrogant Hope and King's Death, even at 50%, is enough to match one of Izuku's full-power Smashes. This will impact a lot of things in the future, especially as Marvin returns to Izuku's body.
For those confused, King's Death is one of Marvin's Supermoves. If you remember, his Quirk enhances his strength thanks to the adrenaline from his emotions. He can also force his emotions out to increase his Dominance Factor and do the same thing with his strength. King's Death is him pushing out his emotions solely for strength, which increases his output at the cost of control and durability.
And Momo and Izuku finally kiss! I didn't want it to happen while Marvin was in Izuku's head. Because if you notice, Momo, after learning of Marvin's existence, is openly affectionate with Izuku only when Marvin isn't there (Final Exams, etc.) and is more reserved when Marvin is present. And that's part of the reason Marvin was out on the battlefield in the first place; I was initially going to have it happen after Kamino but decided that was too long of a wait.